Vibratory converter



o. M. LEICH. l VIBRATORY cNvEIITER. APPLICATION FILED ocT. 31. 1913.

Patented Apr. 27, 1920.l

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OSCAR IVI. LEICI-I, 0F GENOA, ILLINOIS, ASSIGNOR TO LEICH ELECTRIC COMPANY, OF GENOA, ILLINOIS.

VIBRATORY CONVERTER.

Specification of Letters Patent. Patented Apr. 27, 1920.

Application led October 31, 1918. Serial No. 260,426.

T0 all lwhom, t may Concern.'

Be it known that I, OSCAR M. LnIoH, a citizen of the United States, residing at Genoa, in the county of Dekalb and State of Illinois, have invented a certain new and useful Improvementl in YVibratory Converters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to vibratory converters and to systems employing uni-directional pulsatory current obtained from an alternating current source of supply.

Reference may be had in this connection to my Patent No. 1,269,539, issued June 11, 1918.

My invention contemplates primarily the provision' of means whereby a plurality of signaling devices, such, for instance, as telcgraph Sounders each operable over its own individual circuit, are supplied from a common source of uni-directional pulsatory current obtained Vfrom an alternating current sourcev of supply through the agency of vibratory electromagnetic means, in such a manner that these devices may operate without chattering.

In my said patent I have claimed a system such as this applied to one line circuit having a plurality of signaling devices thereon.

The claims inthis present application are directed to the system at the central station where a plurality of signaling elements on different circuits are conjointly supplied with current in a manner to prevent their chattering.

My invention further contemplates the arrangement of a vibratory converter in such a way that the means which are utilized to prevent the chattering may be cooperatively associated with the vibratory converter itself so as to decrease the amount of current necessarily-supplied over the vibratory contacts thereof. The current capacity of vibratory converters is limited to the current carrying capacity of the contacts and one of the prime objects of my invention is the provision of means which will effect the results outlined in connection with signaling systems in such a manner that no additional burden is thrown upon the vibratory contacts.

I will explain my invention more in detail by referring tothe accompanying drawingillustrating the same in which- Figure 1 diagrammatically shows a system constructed in accordance with my invention; and

Fig. 2 shows armodiied circuit arrangement for the vibratory converter whereby the load of the vibratory contacts is decreased.

Referring more particularly to Fig. 1, I show an valternating current source of supply 1 from which current is supplied to the primary windings of the transformer, a suitable resistance device such as the lamp 3 being shown and included in circuit. The transformer has a secondary winding shown inthe form of two coils 4 and 5 so that a connection may be taken off between them as at the junction point 6.

if he two coils 7 and 8 receiving their cur-V rent preferably directly from the alternating current source through the interposition of the condenser 9 actuate an armature 10 synchronously with the alternations of current of the said primary source 1. The armature is preferably spring mounted as is customary in harmonic or similar systems and carries contacts 11, 11 cooperating respectively with contacts 12 and 13.

Current is supplied to the translating or signaling device over the circuit consisting of the conductors 14 and 15. The conductor 14 is connected to the intermediate point 6 and the conductor 15 is connected to the vibratory elements 11. .A resistance 16 whose purpose will be presently apparent is bridged across the conductors 14, 15. The

signaling devices in the particular system herein shown are the telegraph sounders 17. These sounders` are each included 1n a separate telegraph circuit. The sounders are controlled respectively by telegr'sqahv relays 18, said telegraph relays each forming part of separate telegraph lines 19. The circuits through the Sounders can be traced from the conductor 14 by way of conductor 20 through the coil 21 of the sounder, conductor 22, armature 23, back contact 24, conbe the cost of a battery.

ductor 25, to the supply conductor 15. It will be seen that each of the Sounders are in different'circuits but that they all receive their current from the same source of supply, namely the conductors 14; and 15.

It will be noted, of course, that the contacts 12 and 13 respectively are connected to the terminals of the transformer secondaries 5 and 4; by Way of contacts 26, 27.

The source of uni-directional current supply may for the purpose of this application be assumed to be the conductors 14, and 15 or their connecting points with the respective parts of the vibratory converter to which they are connected.

The resistance 16 is bridged across t-his source and this resistance prevents chattering of the armatures 28 of the sounders 17, Without this resistance the operation of the sounders would be very unsatisfactory due to the pulsatory nature of the current employed. It is a great advantage, however, to be able to operate soundersor other similar instruments, from a primary source of supply other than batteries.

Battery renewals always occasion excessive expense, whereas the current actually 4used up in such devices is exceedingly small and does not tax a source of supply such as an alternating source 1. The cost of the current is, therefore, much less than would However, means must be provided as already explained in my said original application, whereby current from such an undulatory source may be made available for translating devices of this character.

To this end I employ the resistance 1G, as I have found after much experimentation that this causes smooth and harmonious operation of the armatures 28 in response to the actuations of the armatures 23.

In Fig. 2 I show a rectifier or converteil similar to the rectiiier shown in F ig. 1 with the exception that resistance 28, 28 are utilized instead of the resistance 16. These resistances 28 as will be apparent are also connected across the source of pulsatory current supply, even though these resistances are in series with the corresponding windings 4' or 5 when a discharge is taking place therethrough. I therefore, wish the term across the source of current supply to be understood as covering both oi the arrangements shown in the drawing, or their equivalent.V

A great advantage, however, resides in the arrangement shown in Fig. 2. If we examine the structure of Fig. 1, We find that the current necessary to operate the trans lating device together with the current that passes over the device 16, all must pass through the vibratory contacts `11 and their coperating contacts 12 and 13.

It is highly desirable to keep the current necessarily passing over the vibratory parts of the device as small as possible and with the arrangement shown in Fig. 2 the current which is normally diverted over the resistance 28 does not need to pass through the vibratory elements 11 or their coperat ing contacts v12 Iand'13. Hence a number oil translating devices can be used equal to the carrying capacity of the vibratory'elements of the device.

From what has been described'the nature of my invention will be readily clear to those skilled in the art.

What I claim as my invention is:

1. A system of the character described comprising a plurality of signaling circuits, electromagnetic signaling instruments associated respectively with saidcircuits, a con;- mon source of pulsating uni-directional current connected to supply said instruments with operating current, and a by-patharranged in bridge connection of said source of current to maintain magnetization of said instruments between pulsations to prevent chattering of the instrument armatures.-

2. A system of the character described comprising a plurality of signaling circuits, electromagnetic signaling instruments asson cia-ted respectively with said circuits, a` common source of pulsating uni-directional current connected to supply said instruments with operating current, and a resistance arranged in bridge connection of said source of current to'maintain magnetization of said instruments between pulsations to prevent chattering of the instrument armatures.l

3. A system of the character described comprising a plurality of signaling circuits,

telegraph Sounders associated respectivelywith said circuits, a common source ofpulsatinfr uni-directional current connected to supply said Sounders with operating current, and a by-path arranged in bridge connection of said source of current to'maintain magnetization of said Sounders between pulsations to prevent chattering of the instru* ment armatures.

In witness whereof I hereunto subscribeV my name this 14th Vday of October, A. D., 1918. Y

OSCAR M.V LEICH.

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